Hi. I dont see circuit. Please post again please!!X10 circuit for 8 ohm dummy loads...
shown is a scope adaptor for an 8 ohm dummy load. the trimmer cap is adjusted for flat-topped peaks on a clipped signal. this circuit is for a 1Meg scope input impedance. the wiring from the adaptor to the scope on mine is RG-214 teflon coax but can be any coax cable.
and after the TV or monitor is disassembled, short the anode button on the tube to the ground braid that goes around the widening part of the tube. that way, if you don't finish working on the TV/monitor, and it has to sit on the shelf for a few days, the tube won't re-develop a charge. some tubes have a rather large amount of dielectric absorption (cheap glass?, or maybe the chemical composition?), which will cause a new charge on the tube, and a nasty surprise when you go to put the display back together. AMDEK CRT tubes were the worst for this, made even worse by the fact that the anode button was next to the chassis, and to reconnect the anode cap, you had to slide your fingers inside this narrow space, and SNAP! you'd get bit....If you ever feel the urge/or need to work on a CRT TV please do the following first:
1. Make sure the unit is unplugged from the Mains source. Unplug the Mains lead.
2. Take an Insulated lead ( like from your DMM) and push the part that fits in your Meter under that thin silverish thin wire strap that goes around the back of the tube. Push it under that. Make sure it stays there while you take the other sharp end and push/force it under that Rubberish cap with a wire coming out of it at the top of the back of the tube.
Sorry, I cannot explain this properly.
What I am trying to say is DISCHARGE THE TUBE.
I might just confuse here rather than help. The only way I know of is to have the person you are trying to help right next to you.
I will leave this post here anyway.
hmm, interesting. i dont have asthma but my head starts to ache pretty easily, dunno why, but i see no harm not to breathe fumes . but, anyway, nice fact you brought in .OK, I've mentioned it before - but I'll mention it again.
A number of years ago I was one of the subjects in a Health & Safety Executive study, in association with a UK University (Sheffield - I think?).
The study was to determine, for the H&S Executive (so would become UK legislation), if the flux fumes from soldering caused asthma attacks in service engineers.
The result of the study was that the amount of soldering done by service engineers was no problem whatsoever, but on a production line where you were soldering 8 hours a day fume extraction was deemed necessary and made a legal requirement. In fact the country wide study didn't find a single service engineer who had asthma attacks, they did wonder if they all died or left the trade
But as a result of the study soldering flux was changed - and modern fluxes don't have the possible asthma attack inducing chemicals - but also are a FAR less effective flux.
Hope this might help you?.